|Publication number||US7344418 B2|
|Application number||US 10/579,326|
|Publication date||Mar 18, 2008|
|Filing date||Nov 19, 2004|
|Priority date||Nov 20, 2003|
|Also published as||CN2682639Y, US20070134995, WO2005053369A1|
|Publication number||10579326, 579326, PCT/2004/39084, PCT/US/2004/039084, PCT/US/2004/39084, PCT/US/4/039084, PCT/US/4/39084, PCT/US2004/039084, PCT/US2004/39084, PCT/US2004039084, PCT/US200439084, PCT/US4/039084, PCT/US4/39084, PCT/US4039084, PCT/US439084, US 7344418 B2, US 7344418B2, US-B2-7344418, US7344418 B2, US7344418B2|
|Original Assignee||Molex Incorporated|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (26), Classifications (9), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention generally relates to the art of electrical connectors and, particularly, to a double-ended electrical terminal for pressure-engagement between a pair of electrical devices.
Another prior art pressure engaging terminal is shown in
Whereas prior art terminal 10 in
An object, therefore, of the invention is to provide a new and improved electrical terminal of the character described.
In the exemplary embodiment of the invention, the terminal includes a first contact member having an outer pressure contacting end portion of a given diameter for pressure engaging a first electrical device. The first contact member has an inner end portion of a diameter at least slightly larger than the given diameter of the outer end portion. A second contact member has a front pressure contacting end for pressure engaging a second electrical device. The second contact member has a rear end formed with a hole for reciprocally receiving the inner end portion of the first contact member. A restricted stop is formed at the rear end of the hole for abutting the inner end portion of the first contact member to define an outer limit position of the first contact member. A biasing member is disposed in the hole in the second contact member and is engageable with the inner end portion of the first contact member. The biasing member resiliently biases the first and second contact members in opposite directions. This terminal construction completely eliminates the housings of the prior art.
As disclosed herein, the outer pressure contacting end portions of the first and second contact members are dome shaped to present rounded convex contact surfaces for engaging the two electrical devices. The biasing member is a coil spring having opposite ends engageable with the inner end portion of the first contact member. Preferably, the inner end portion of the first contact member and the hole in the second member are circular in cross-section.
According to one aspect of the invention, the second contact member includes an outwardly projecting bearing flange for reciprocally engaging a bearing surface on the second electrical device. In the exemplary embodiment, the bearing flange comprises a peripheral bearing ring about the second contact member. The bearing ring is located near the rear end of the second contact member.
According to another aspect of the invention, a second electrical device is provided and includes a housing having a mounting cavity with a fixed contact at a base of the cavity. The rear end of the second contact member is reciprocally mounted in the cavity, with the bearing ring slidably engageable with the inner walls of the cavity. The pressure contacting end portion of the first contact member is biased into engagement with the fixed contact at the base of the cavity. The pressure contacting end of the second contact member projects from the housing. The cavity has a restricted stop at an open end thereof for abutting the bearing ring to define an outer limit position of the second contact member projecting from the housing.
Other objects, features and advantages of the invention will be apparent from the following detailed description taken in connection with the accompanying drawings.
The features of this invention which are believed to be novel are set forth with particularity in the appended claims. The invention, together with its objects and the advantages thereof, may be best understood by reference to the following description taken in conjunction with the accompanying drawings, in which like reference numerals identify like elements in the figures and in which:
Referring to the drawings in greater detail, and first to
First contact member 32 includes an elongated, outer pressure contacting end portion 32 a of a given diameter for pressure engaging a first electrical device as described hereinafter. The first contact member includes an inner end portion 32 b of a diameter larger than the given diameter of outer end portion 32 a.
Second contact member 34 has an elongated, front pressure contacting end 34 a for pressure engaging a second electrical device as described hereinafter. A rear end 34 b of the second contact member has a cylindrical hole 38 for reciprocally receiving the inner end portion 32 b of first contact member 32, while outer end portion 32 a of the first contact member extends through an opening 40 at the rear end of the second contact member. Coil spring 36 is compressed between inner end portion 32 b of the first contact member and a bottom or base 38 a of cylindrical hole 38 in the second contact member to bias the outer end portion 32 a of the first contact member outwardly relative to the second contact member. Finally, the second contact member is provided or formed with an outwardly projecting bearing flange 42 which extends completely around the second contact member to form a peripheral bearing ring for purposes described hereinafter. The bearing ring is located near the rear end 34 b of the second contact member.
During assembly, coil spring 36 first is inserted into cylindrical hole 38 in second contact member 34. The enlarged inner end portion 32 b of first contact member 32 then is assembled into the hole on top of the coil spring to compress the spring. Rear end 34 b of the second contact member then is riveted or bent to capture the inner end portion 32 b of the first contact member within the rear end of the second contact member within the rear end of cylindrical hole 38. The riveting or bending of rear end 34 b of the second contact member defines a circular restricted stop 44 at the rear end of hole 38 for abutting the inner end portion 32 b of the first contact member to define an outer limit position of the outer end portion 32 a of the first contact member.
As can be seen in the drawings, outer end portion 32 a of first contact member 32 and front end 34 a of second contact member 34 are dome shaped to present rounded convex contact surfaces 46 for the first contact member and 48 for the second contact member, for engaging appropriate electrical devices as shown hereinafter. Preferably, the inner end portion 32 b of first contact member 32 as well as hole 38 in the second contact member are circular in cross-section.
When terminal 30 is mounted in first electrical device 50, rear end 34 b of second contact member 34 is reciprocally mounted within mounting cavity 54 of housing 52 of the first electrical device, with bearing ring 42 slidably engageable with inner walls 54 a of cavity 54. Pressure contacting end portion 32 a of first contact member 32 is biased by coil spring 36 into engagement with fixed contact 56 at base 54 b of the cavity. The pressure contacting end 34 a of second contact member 34 projects through opening 56 and from housing 52. Restricted stop 58 at opening 57 of housing 52 abuttingly engages bearing ring 42 to define an outer limit position of second contact member 34 projecting from housing 52, as seen in
It will be understood that the invention may be embodied in other specific forms without departing from the spirit or central characteristics thereof. The present examples and embodiments, therefore, are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein.
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|U.S. Classification||439/700, 439/824|
|International Classification||H01R13/24, H01R11/18, H05K7/10|
|Cooperative Classification||H01R12/714, H01R13/2421, H01R11/18|
|Feb 1, 2007||AS||Assignment|
Owner name: MOLEX INCORPORATED, ILLINOIS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:XU, XIANG;REEL/FRAME:018840/0583
Effective date: 20060517
|Oct 31, 2011||REMI||Maintenance fee reminder mailed|
|Mar 18, 2012||LAPS||Lapse for failure to pay maintenance fees|
|May 8, 2012||FP||Expired due to failure to pay maintenance fee|
Effective date: 20120318